The challenge there is that ISIL doesn't have an air force, so the damage done there is not against ISIL, it's against the Syrian regime.

Let's say hypothetically, knowing what we know now about public policy, that we could close the education gap so that it was only a couple percentage points, and we could make sure that hiring barriers and educational barriers had been leveled down, and unemployment among African Americans right now instead of being double was only 10 percent higher than white unemployment - if we got to that point , America as a whole would be a lot richer.

I believe that there are many paths to the same place, and that is a belief that there is a higher power, a belief that we are connected as a people.

Libraries have a special role to play in our knowledge economy. Your institutions have been and should be a place where parents and children come to read together and learn together. We should take our kids there more.

I've always viewed the Paris Agreement as a starting point. If you look at all the commitments that have been made by all the countries, it's still not sufficient to deal with the very dangerous situation we face. What it has done is that it created an architecture whereby as technology improves, as we find new clean sources of energy, as we make our economies more efficient, then gradually we can turn up the dial and improve the outcomes of Paris.

One of the thing about being President - that can't be taught, you have to experience, is - there is the sheer weight of decision making. And when I make a decision to send 17,000 young Americans to Afghanistan - you can understand that intellectually. But understanding what that means for those families, for those young people - when you end up sitting at your desk, signing - a condolence letter to one of the family members of a fallen hero - you're reminded each and every day, at every moment, that - the decisions you make count.

There's no doubt that I'm a better president now than when I first took office. This is not a job where there's a manual, and over time you get a better sense of what's important, what's not, how to see around corners and anticipate problems, as opposed to just managing problems once they've arrived.